Question

我创建了一个具有定期后台服务（带有警报管理器）的应用程序，该服务每隔x分钟启动一次，因此到目前为止，一切都很好，我可以毫无问题地启动或停止服务。释放模式，此后无论我启动该服务，应用程序都会崩溃！

这是我的代码。

从共享项目启动/停止服务

DependencyService.Get<IAndroidNotifications>().StartNotificationsService();

DependencyService.Get<IAndroidNotifications>().StopNotificationsService();

通知类

public void StartNotificationsService()
{
//Start Notifications Service
Intent myIntent = new Intent(context, typeof(NotificationsService));
context.StartService(myIntent);


//Show Snackbar message
Activity activity = CrossCurrentActivity.Current.Activity;
Android.Views.View activityRootView = 
activity.FindViewById(Android.Resource.Id.Content);
Snackbar.Make(activityRootView, "Notifications on", 
Snackbar.LengthLong).Show();
}

public void StopNotificationsService()
{
//Stop Notifications Service
Intent myIntent = new Intent(context, typeof(NotificationsService));
context.StopService(myIntent);


//Show Snackbar message
Activity activity = CrossCurrentActivity.Current.Activity;
Android.Views.View activityRootView = 
activity.FindViewById(Android.Resource.Id.Content);
Snackbar.Make(activityRootView, "Notifications off", 
Snackbar.LengthLong).Show();
}

public bool CheckNotificationsService()
{
ActivityManager manager = 
(ActivityManager)context.GetSystemService(Context.ActivityService);
foreach (var service in manager.GetRunningServices(int.MaxValue))
{
    string x = service.Service.ClassName;
    if (service.Service.ClassName == "com.TestApp.NotificationsService") 
    {
        return true;
    }
}
return false;
}

private void StartAlarm(bool isRepeating)
{
AlarmManager manager = (AlarmManager)GetSystemService(Context.AlarmService);
Intent myIntent;
PendingIntent pendingIntent;


myIntent = new Intent(this, typeof(NotificationsAlarm));
pendingIntent = PendingIntent.GetBroadcast(this, 0, myIntent, 0);


if (!isRepeating)
{
    manager.Set(AlarmType.RtcWakeup, SystemClock.ElapsedRealtime() + 3000, 
pendingIntent);
}
else
{
    manager.SetRepeating(AlarmType.RtcWakeup, SystemClock.ElapsedRealtime() 
+ 3000, 60 * 1000, pendingIntent);
}

}
}

通知服务

[Service
(Name = "com.TestApp.NotificationsService",
Label = "Service Notifications")]
class NotificationsService : Service
{
AlarmManager manager;
Intent myIntent;
PendingIntent pendingIntent;

public override IBinder OnBind(Intent intent)
{
   return null;
}

//[return: GeneratedEnum]
public override StartCommandResult OnStartCommand(Intent intent, 
StartCommandFlags flags, int startId)
{
//return base.OnStartCommand(intent, flags, startId);
manager = (AlarmManager)GetSystemService(Context.AlarmService);



myIntent = new Intent(this, typeof(NotificationsAlarm));
pendingIntent = PendingIntent.GetBroadcast(this, 0, myIntent, 0);

manager.SetRepeating(AlarmType.RtcWakeup, SystemClock.ElapsedRealtime() + 
1000, 60 * 1000, pendingIntent);


//Toast.MakeText(this, "Greating from our first service", 
ToastLength.Long).Show();
return StartCommandResult.Sticky;
}

public override void OnDestroy()
{
base.OnDestroy();
pendingIntent.Cancel();
manager.Cancel(pendingIntent);
}

}
}

广播接收器

namespace TestApp.Droid
{
[BroadcastReceiver(Enabled = true)]
public class NotificationsAlarm : BroadcastReceiver
{
static Random random = new Random();
int randomNumber = random.Next(0, 1000);

InfosAPI _infosAPI;
public override void OnReceive(Context context, Intent intent)
{
Toast.MakeText(context, "Received intent!", ToastLength.Long).Show();

//something else here
}

}
}

有什么建议吗？谢谢

Android后台服务在发布模式下不起作用？

0 个答案: